New York (CNN) — When the suspect in the fatal shooting of UnitedHealthcare Chief Executive Brian Thompson was arrested last year after a high-profile five-day manhunt, many people had a question: What was Luigi Mangione doing at a McDonald’s in Altoona, Pennsylvania?

One of the first officers on the scene was doubtful he would actually find the suspect inside the restaurant, he testified Tuesday, after responding to a 911 call from the McDonald’s manager.

“I did not think it was going to be the person that they thought it was,” Altoona Police Officer Joseph Detwiler said, opening the second day of a hearing Mangione’s attorneys requested over whether some key evidence should be barred from his New York murder case.

Detwiler told prosecutors in court that his boss jokingly promised to

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